A MURA detection device

Abstract

The application belongs to the technical field of MURA detection, and specifically discloses a MURA detection device, which comprises a jig conveying unit, a product detection unit and a jig transfer unit, the jig conveying unit is used for conveying a jig with a product; the product detection unit comprises a table for bearing the jig, a probe module for lighting the product in the jig, a MURA film group for adhering the product to highlight the product display defects, an adjusting module for adjusting the relative positions of the table, the probe module and the MURA film group, the adjusting module is also used for driving the table, the probe module and the MURA film group to move between the interactive station and the detection station, for the jig transfer unit to transfer the jig back and forth between the table and the jig conveying unit, and for the detection of the product. The MURA detection device has high automation degree, and can conveniently transport, light and detect the product.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of MURA detection, and more particularly to a MURA detection device. BACKGROUND

[0002] With the continuous development of display technology, the demand of users for display products has begun to develop in the direction of large size and ultra-high resolution. With the increase in the size of display products and the improvement in the resolution, the difficulty of producing and manufacturing display products has increased exponentially, and the probability of defects in display products has also increased.

[0003] In the related art, display panels and other products need to go through multiple detection procedures before leaving the factory to prevent unqualified products from entering the market. In the detection link, MURA detection mainly detects real defects such as uneven brightness of products and various trace phenomena, so as to compensate for the defects after they are detected, and thus improve the MURA of the products. However, the current MURA detection method is relatively cumbersome and has low automation, and needs to be improved. SUMMARY

[0004] In view of the defects or improvement needs of the prior art, the application provides a MURA detection device, aiming to improve the automation of MURA detection of display panels.

[0005] The MURA detection device provided by the application specifically comprises a jig conveying unit, a product detection unit, and a jig transfer unit, wherein:

[0006] The jig conveying unit is used to convey a jig with a product;

[0007] The product detection unit is located beside the jig conveying unit and comprises a carrier for carrying the jig, a probe module for lighting the product in the jig, a MURA film group for adhering to the product to highlight the display defects of the product, and an adjustment module for adjusting the relative positions of the carrier, the probe module, and the MURA film group. The adjustment module is also used to drive the carrier, the probe module, and the MURA film group to move between the interaction station and the detection station.

[0008] When the carrier is located at the interaction station and the carrier and the MURA film group are separated from each other, the jig transfer unit is used to drive the jig to transfer back and forth between the carrier and the jig conveying unit.

[0009] When the carrier is located at the detection station and the product in the carrier is adhered to the MURA film group and is lit by the probe module, the detection of the product is performed.

[0010] Compared with the prior art, the jig conveying unit, the product detection unit and the jig transfer unit can cooperate with each other, and the transportation, lighting, film pasting and detection of the product (i.e., the display panel) can be smoothly performed.

[0011] During the detection process, the jig is transferred back and forth between the jig conveying unit and the product detection unit by the jig transfer unit, and then the jig with the product is conveyed into the product detection unit, the product is automatically lit by the product detection unit, and the product display defects are highlighted by the MURA film group. Since the product detection unit has an interactive station and a detection station, the product detection unit can conveniently and quickly transfer the jig with the product back and forth between the jig conveying unit when it is in the interactive station, can detect when it is in the detection station, and can return the jig with the product after detection and information recording to the jig conveying unit by the jig transfer unit for flow conveying, thereby completing the entire MURA detection process. The detection process has a high degree of automation.

[0012] As a further preferred, the product detection unit further comprises a detection frame and a movable frame positionally adjustably arranged on the detection frame, and the stage, the probe module and the MURA film group are arranged in the movable frame;

[0013] The adjusting module comprises a station adjusting mechanism and a position adjusting mechanism, the station adjusting mechanism is used for adjusting the position of the movable frame to drive the stage, the probe module and the MURA film group to move between the interactive station and the detection station, and the position adjusting mechanism is used for adjusting the distance between the stage, the probe module and the MURA film group;

[0014] Preferably, the station adjusting mechanism is used for driving the movable frame to rotate.

[0015] As a further preferred, the MURA film group comprises:

[0016] MURA films are stacked with multiple layers, the length of the lowermost MURA film is greater than that of the remaining MURA films, and the lowermost MURA film is fixed with the edge portions of the remaining MURA films;

[0017] Clamping assemblies are symmetrically arranged in two, and are used for clamping opposite ends of the lowermost MURA film;

[0018] Tensioning assemblies are installed on the movable frame, and are used for adjusting the distance between the two clamping assemblies to tension the MURA film.

[0019] As a further preferred, the product detection unit further comprises a pressing mechanism for pressing the jig to be positioned on the stage.

[0020] As a further preferred, the product detecting unit further comprises a support wheel set which is adjustable between a first position and a second position;

[0021] The support wheel set protrudes from the upper surface of the loading platform when in the first position, for transferring the jigs to and from the jig transfer unit;

[0022] The support wheel set is adjusted from the first position to the second position, for resting the jigs on the upper surface of the loading platform.

[0023] As a further preferred, the jig transfer unit comprises:

[0024] A clamp for clamping and releasing the jigs;

[0025] A clamp adjusting assembly for driving the clamp to move between the jig conveying unit and the product detecting unit.

[0026] As a further preferred, the jig conveying unit comprises:

[0027] A conveying mechanism for conveying the jigs carrying the products;

[0028] An adjusting mechanism for driving the jigs in the conveying mechanism to adjust positions, so that the jigs are separated from the conveying mechanism and located in the transfer track of the jig transfer unit.

[0029] As a further preferred, the adjusting mechanism comprises:

[0030] A blocking assembly for intercepting and releasing the jigs in the conveying mechanism;

[0031] A pushing assembly for pushing the jigs in the conveying mechanism, the pushing direction of the pushing assembly intersects with the conveying direction of the conveying mechanism;

[0032] A lifting assembly for lifting the jigs which are pushed by the pushing assembly and intercepted by the blocking assembly, so that the jigs are lifted to the transfer track of the jig transfer unit.

[0033] As a further preferred, the MURA detecting device further comprises an information recording unit, when the loading platform is located at the interactive station, and the products in the loading platform are attached to the MURA film set and illuminated by the probe module, the information recording unit records the display information of the products.

[0034] As a further preferred, the MURA detecting device further comprises a sensor and a length measuring tool which are clamped beside the MURA film set, the detection end of the sensor and the extendable detection end of the length measuring tool are both directed to the loading platform, and the loading platform is attached to the detection end of the length measuring tool when the products on the loading platform are attached to the MURA film set.

[0035] Overall, compared with the prior art, the above technical solutions conceived by the present application mainly have the following technical advantages:

[0036] 1. The jig conveying unit, product detection unit, jig transfer unit and information recording unit in the design can cooperate with each other to realize smooth transportation, detection and information recording of products (i.e., display panels). The product detection unit has an interactive station and a detection station, so that the product detection unit can conveniently and quickly pass the jig with products back and forth with the jig conveying unit when it is at the interactive station, can detect the lit product when it is at the detection station, can be at the detection station again for the information recording unit to record product information, and can be at the detection station again for the jig transfer unit to return the jig with the product that has completed detection and information recording to the jig conveying unit for circulation and conveying.

[0037] 2. The MURA film is designed to have multiple layers, and the bottommost MURA film is edge-connected with the upper MURA film, and the bottommost MURA film is in a tensioned state, which can reduce background interference during product detection and eliminate the influence of environmental factors such as backlight or ambient light, thereby improving the accuracy and authenticity of detection.

[0038] 3. The stage in the product detection unit can be adjusted in rotation, which is convenient for product detection and also convenient for the transfer of the jig with products between the stage and the jig conveying unit through the jig transfer unit. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic diagram of the main structure of a MURA detection device provided by an embodiment of the present application;

[0040] Figure 2 is a position layout diagram of the jig conveying unit, product detection unit and jig transfer unit provided by an embodiment of the present application;

[0041] Figure 3 is a position layout diagram of the jig conveying unit and jig transfer unit provided by an embodiment of the present application;

[0042] Figure 4 is a top view of the jig conveying unit and jig transfer unit provided by an embodiment of the present application;

[0043] Figure 5 is a schematic diagram of the local structure of the jig conveying unit provided by an embodiment of the present application;

[0044] Figure 6 is a front view of the jig conveying unit and jig transfer unit provided by an embodiment of the present application;

[0045] Figure 7FIG. 1 is a structural schematic diagram of a lifting power piece, a lifting plate and a roller provided by an embodiment of the present application;

[0046] Figure 8 FIG. 5 is a main body structural schematic diagram of a product detection unit provided by an embodiment of the present application;

[0047] Figure 9 FIG. 6 is a front view of a product detection unit provided by an embodiment of the present application;

[0048] Figure 10 FIG. 7 is a partial structural schematic diagram of a product detection unit provided by an embodiment of the present application;

[0049] Figure 11 FIG. 8 is a top view of a MURA film group provided by an embodiment of the present application;

[0050] Figure 12 FIG. 9 is a bottom view of a MURA film group provided by an embodiment of the present application;

[0051] Figure 13 FIG. 10 is a structural schematic diagram of a carrier and a supporting wheel group provided by an embodiment of the present application;

[0052] Figure 14 FIG. 11 is a structural schematic diagram of a main imaging device and a matching position adjusting assembly provided by an embodiment of the present application;

[0053] Figure 15 FIG. 12 is a structural schematic diagram of a side imaging device and a matching position adjusting assembly provided by an embodiment of the present application;

[0054] Figure 16 FIG. 13 is a whole structural schematic diagram of a MURA detection device provided by an embodiment of the present application. In all the drawings, the same reference signs are used to represent the same elements or structures, wherein:

[0055] 1, Jig conveying unit; 1-1, Roller conveyor; 1-2, Blocking power element; 1-3, Blocking plate; 1-4, Flat pushing power element; 1-5, Push block; 1-6, Conical protrusion; 1-7, Rectangular protrusion; 1-8, Lifting power element; 1-9, Lifting plate; 1-10, Roller; 2, Product detection unit; 2-1, Stage; 2-2, Probe module; 2-3, Detection frame; 2-4, Movable frame; 2-5, Rotating power element; 2-6, Side support; 2-7, MURA film; 2-8, Upper clamping plate; 2-9, Lower clamping plate; 2-10, Mounting seat; 2-11, Threaded rod; 2-12, Synchronous lifter; 2-13, Support plate; 2-14, Support wheel; 2-15, Lifting adjusting element; 2-16, Jacking element; 2-17, Pressing power element; 2-18, Pressing plate; 3, Jig transfer unit; 3-1, Clamp; 3-2, Horizontal displacement adjusting element; 3-3, Vertical displacement adjusting element; 4, Information recording unit; 4-1, Main imaging device; 4-2, Side imaging device; 4-3, Multi-degree-of-freedom platform; 4-4, First linear module; 4-5, Second linear module; 4-6, Angle adjuster; 5, Jig; 5-1, V-shaped notch; 5-2, POGO assembly; 6-1, First sensor; 6-2, Second sensor; 6-3, Third sensor; 6-4, Fourth sensor; 6-5, Micrometer; 7, Light shielding structure. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0057] The present application will be further described below with reference to the drawings and embodiments. Figures 1-16 The present application will be further described below with reference to the drawings and embodiments.

[0058] The present application discloses a MURA detection device. Referring to Figures 1-3The MURA detection device comprises a jig conveying unit 1, a product detection unit 2 and a jig transfer unit 3, wherein the jig conveying unit 1 is used for conveying the jig 5 with products; the product detection unit 2 is located beside the jig conveying unit 1 and comprises a carrier 2-1 for carrying the jig 5, a probe module 2-2 for lighting the products in the jig 5, a MURA film group for adhering to the products to highlight the display defects of the products, and an adjusting module for driving the carrier 2-1, the probe module 2-2 and the MURA film group to move relatively and jointly between the interaction station and the detection station. When the carrier 2-1 is located at the interaction station and the carrier 2-1 and the MURA film group are separated from each other, the jig transfer unit 3 is used for transferring the jig 5 with products between the carrier 2-1 and the jig conveying unit 1; when the carrier 2-1 is located at the detection station and the products in the carrier 2-1 are adhered to the MURA film group and are lighted by the probe module 2-2, the detection of the products is performed.

[0059] Further, the MURA detection device further comprises a control unit and a position detection unit, the position detection unit is used for detecting the position of the jig 5 at multiple points, the control unit is electrically connected with the jig conveying unit 1, the product detection unit 2, the jig transfer unit 3 and the position detection unit, and is used for controlling the operation of the jig conveying unit 1, the product detection unit 2 and the jig transfer unit 3 based on the detection result of the position detection unit, so as to realize the automatic flow and information recording of the products in the device. The control unit comprises a PC host and a control panel, the control panel is arranged beside the detection station of the product detection unit and is used for manual operation, and the operation principle of the control unit is the prior art, which will not be described in detail here.

[0060] Further, the jig conveying unit comprises a conveying mechanism and an adjusting mechanism, the conveying mechanism is used for conveying the jig 5 with products, and the adjusting mechanism is used for driving the jig 5 in the conveying mechanism to adjust the position, so as to separate the jig 5 from the conveying mechanism and drive the jig 5 to move to the transfer track of the jig transfer unit 3, so as to transfer the jig 5 back and forth with the jig transfer unit.

[0061] Under this design, the conveying mechanism forms an inlet station at the inlet port thereof, forms a material residence station at the adjusting mechanism, and forms an outlet station at the outlet port; the jig 5 with products is placed at the inlet station, then the jig transfer unit 3 transfers the jig 5 at the residence station, so as to convey the jig 5 to the product detection unit 2 for product detection, and the detected products are sent back to the residence station with the jig 5 after information recording, and then are conveyed to the outlet station by the conveying mechanism, so as to complete the MURA detection of the products.

[0062] Specifically, the conveying mechanism can adopt a belt conveying mechanism, a chain conveying mechanism, an air cushion conveying mechanism, or a roller conveying mechanism, etc., as long as it can stably and directionally transport the jig 5. In the embodiment, the conveying mechanism adopts a roller conveying mechanism, specifically, a roller conveyor 1-1.

[0063] Further, as shown in Figures 3-4 The adjusting mechanism includes a blocking assembly, a horizontal pushing assembly, and a lifting assembly. The blocking assembly is used to intercept and release the jig 5 in the conveying mechanism. The horizontal pushing assembly is used to horizontally push the jig 5 in the conveying mechanism, and the pushing direction of the horizontal pushing assembly intersects with the conveying direction of the conveying mechanism. The lifting assembly is used to lift the jig 5 that has been pushed by the horizontal pushing assembly and intercepted by the blocking assembly, so that the jig 5 is lifted to the transfer track of the jig transfer unit.

[0064] Under this design, the horizontal pushing assembly and the blocking assembly cooperate with each other to realize the positioning of the jig 5 in the X-axis and Y-axis directions on the conveying surface of the conveying mechanism (i.e., planar positioning). By lifting the jig 5 that has been positioned by the lifting assembly, the position of the jig 5 in the Z-axis direction can be adjusted, so that the jig 5 can be accurately stopped at the target spatial coordinate position, thereby facilitating the jig transfer unit 3 to accurately obtain the jig 5 and to transfer the jig 5 between the jig conveying unit 1 and the product detection unit 2.

[0065] Further, the blocking assembly includes a blocking power member 1-2 and a blocking plate 1-3. The blocking power member 1-2 is arranged above the roller conveyor 1-1 through a support member, and is used to drive the blocking plate 1-3 to move close to or away from the conveying mechanism. After the blocking plate 1-3 moves close to the transmission assembly, the jig 5 in the conveying mechanism can be intercepted. After the blocking plate 1-3 moves away from the conveying mechanism, the jig 5 will no longer be intercepted. The blocking power member 1-2 can be a pneumatic cylinder, an electric push rod, an oil cylinder, etc. In the embodiment, the blocking power member 1-2 is selected as a pneumatic cylinder.

[0066] In addition, in other embodiments, the blocking assembly can also intercept the jig 5 in the horizontal direction or the oblique direction, etc. Of course, when saving costs, the blocking assembly can only include the blocking power member 1-2, and the movable end of the blocking power member 1-2 directly intercepts the jig 5. Of course, in some embodiments, the blocking assembly can also be arranged in multiple numbers along the conveying direction of the conveying mechanism to realize the segmented interception of the jigs 5 one by one, so as to control the detection rhythm of the product.

[0067] Further, the pushing direction of the horizontal pushing assembly is preferably perpendicular to the conveying direction of the conveying mechanism. For example, as shown in Figures 3-6As shown, the flat pushing assembly comprises flat pushing power elements 1-4 and a pushing block 1-5 fixed at the output ends of the flat pushing power elements 1-4, the flat pushing power elements 1-4 are fixed at the upper end of the roller conveyor 1-1, the output ends of the flat pushing power elements 1-4 can drive the pushing block 1-5 to move laterally on the conveying upper end surface of the roller conveyor 1-1 to adjust the flat pushing of the jig 5, and the flat pushing power elements 1-4 are preferably air cylinders. In other embodiments, the flat pushing power elements 1-4 can also be electric push rods or oil cylinders, etc.

[0068] Further, as shown in Figure 5 The end of the pushing block 1-5 is shaped with a conical protrusion 1-6 and a rectangular protrusion 1-7, and the jig 5 has V-shaped notches 5-1 on the opposite sides, and the V-shaped notches 5-1 are matched with the conical protrusion 1-6. When the flat pushing cylinder drives the pushing block 1-5 to move, the conical protrusion 1-6 at the end of the pushing block 1-5 can be inserted into the V-shaped notch 5-1 of the jig 5, and the rectangular protrusion 1-7 at the end can be attached to the upper surface of the jig 5, so as to realize the precise butt joint of the pushing block 1-5 and the jig 5.

[0069] Of course, in other embodiments, the flat pushing assembly can also only comprise flat pushing power elements 1-4, such as flat pushing cylinders, which directly push the jig 5 through the piston rod of the flat pushing cylinder.

[0070] Further, when the conveying mechanism adopts the roller conveyor 1-1, the circumferential upper surface of the roller in the roller conveyor 1-1 is below the upper end surface of the frame of the roller conveyor 1-1. Under this setting, when the flat pushing assembly pushes the jig 5 on one side of the jig 5, the other side of the jig 5 can be attached to the surface of the frame, so as to realize the limiting of the opposite sides of the jig 5.

[0071] Further, the flat pushing assembly can be provided in multiple, and the multiple flat pushing assemblies are used to simultaneously push the jig 5 to improve the stability of the pushing process. For example, the flat pushing assembly is installed on the frame of the roller conveyor 1-1 in two, and the two flat pushing assemblies are spaced apart along the conveying direction of the roller conveyor 1-1.

[0072] Further, as shown in Figures 6-7 The lifting assembly comprises lifting power elements 1-8 and a lifting plate 1-9, the lifting power elements 1-8 are arranged at the gap between the rollers in the roller conveyor 1-1, and the lifting plate 1-9 is fixed to the output end of the lifting power elements 1-8. The output end of the lifting power elements 1-8 can drive the lifting plate 1-9 to extend upwards between the adjacent two rollers to above the rollers, so as to lift the jig 5 on the rollers. Among them, the lifting power elements 1-8 are preferably air cylinders, and can also be electric push rods or oil cylinders, etc.

[0073] Further, the length direction of the lifting plate 1-9 is consistent with the length direction of the roller, and a plurality of rollers 1-10 are installed on the lifting plate 1-9. The arrangement of the plurality of rollers 1-10 is consistent with the length direction of the lifting plate 1-9, and the rotation axis of the plurality of rollers 1-10 is perpendicular to the rotation axis of the roller, so as to support the jig through the plurality of rollers 1-10.

[0074] Further, in order to accurately control the operation cycle of each part in the jig conveying unit 1, the position detection unit includes a first detection sub-unit arranged at the jig conveying unit 1, which is used to detect the real-time position of the jig 5 in the jig conveying unit 1. The control unit can control the operation of each part in the jig conveying unit 1 based on the real-time position information of the first detection sub-unit, so as to realize the automatic control of the conveying, intercepting, positioning and lifting of the jig 5.

[0075] As preferred, as shown in Figure 6 The first detection sub-unit includes a first sensor 6-1 for detecting the position of the jig 5 in the conveying mechanism, and a second sensor 6-2 for detecting whether the blocking assembly is intercepted in place. The first sensor 6-1 and the second sensor 6-2 can be infrared sensors or touch switches, etc.

[0076] When the conveying mechanism is selected as the roller conveyor 1-1, the first sensor 6-1 can be an infrared sensor fixed in the roller conveyor 1-1. The infrared sensor is arranged at the gap between two adjacent rollers. The jig 5 conveyed through the roller conveyor 1-1 will block the infrared rays, and the infrared sensor can send a signal to the control unit to obtain the position information of the jig 5.

[0077] When the blocking assembly includes a blocking power member 1-2 and a blocking plate 1-3, the second sensor 6-2 is preferably arranged on the blocking plate 1-3. Further preferably, the second sensor 6-2 is arranged above the blocking surface of the blocking plate 1-3 through an angle iron. The second sensor 6-2 generates a signal when the jig 5 contacts the blocking plate 1-3 (for example, the second sensor 6-2 is a touch switch, and the jig 5 contacts the second sensor 6-2 when it contacts the blocking plate 1-3), and transmits the signal to the control unit.

[0078] Further, as shown in Figures 2-4 In order to realize the back and forth flow of the jig 5 between the jig conveying unit 1 and the product detection unit 2, the jig transfer unit 3 includes a clamp 3-1 and a clamp adjusting assembly. The clamp 3-1 can automatically clamp and release the jig 5 under the control of the control unit, and is preferably a pneumatic finger, and two clamps 3-1 are arranged. The clamp adjusting assembly drives the clamp 3-1 to move between the transfer station and the interaction station, so as to adjust the position of the clamp 3-1.

[0079] Further, as shown in the embodiment, the jig adjusting assembly includes a transverse displacement adjusting member 3-2 and a vertical displacement adjusting member 3-3. The transverse displacement adjusting member 3-2 is arranged above the jig conveying unit 1 and has a movement axis perpendicular to the conveying direction of the jig conveying unit 1, so as to realize 90-degree turning of the jig 5. The transverse displacement adjusting member 3-2 is preferably a linear module, and can also be replaced by a pneumatic cylinder or an electric push rod. Figures 2-4 The vertical displacement adjusting member 3-3 is installed at the movement end of the transverse displacement adjusting member and is used to drive the jig 3-1 to perform vertical displacement (i.e. displacement in the Z-axis direction) adjustment. The vertical displacement adjusting member 3-3 is preferably a pneumatic cylinder. The transverse displacement adjusting member 3-2 and the vertical displacement adjusting member 3-3 are used in cooperation to drive the jig 3-1 to move between the jig conveying unit 1 and the product detection unit 2, so as to send the jig 5 with the product to be detected to the product detection unit 2 for product detection, and then send the jig 5 with the product after detection back to the jig conveying unit 1, and send the jig 5 with the product after detection to the next process through the jig conveying unit 1.

[0080] Of course, in other embodiments, the jig adjusting assembly can also be selected from a multi-degree-of-freedom motion platform or a multi-degree-of-freedom mechanical arm, as long as it can drive the jig 3-1 to perform displacement adjustment between the interactive station and the detection station.

[0081] Further, in order to realize product detection, the product detection unit 2 further includes a detection frame 2-3 and a movable frame 2-4 which is positionally adjustable arranged on the detection frame 2-3. The carrier 2-1, the probe module 2-2 and the MURA film group are arranged in the movable frame 2-4.

[0082] In order to realize adjustment of each movable component in the product detection unit 2, the adjustment module includes a station adjusting mechanism and a position adjusting mechanism. The station adjusting mechanism is used to adjust the position of the movable frame 2-4, so as to drive the carrier 2-1, the probe module 2-2 and the MURA film group to move between the interactive station and the detection station together. The position adjusting mechanism is used to adjust the distance between the carrier 2-1, the probe module 2-2 and the MURA film group.

[0083]

[0084] ​Specifically, the adjustment mode of the movable frame 2-4 on the detection frame 2-3 can be rotation, linear movement, or multi-degree-of-freedom movement. As long as the movable frame 2-4 is adjusted to a certain position on the movement track, the transfer of the jig 5 between the jig conveying unit 1 and the jig transfer unit 3 can be realized, and when the movable frame 2-4 is adjusted to another position on the movement track, the detection of the product can be performed, preferably by manual observation. When the product is judged to be unqualified by manual inspection, the personnel can mark the product as unqualified on the control panel. Of course, the detection of the product can also be performed by a detection module. The detection principle and control principle of the detection module are prior art, and will not be described in detail here.

[0085] As preferred, as shown in FIG. 2, the movable frame 2-4 is rotationally connected with the detection frame 2-3, and the station adjustment mechanism comprises a rotary power member 2-5 for driving the movable frame 2-4 to rotate. The rotary power member 2-5 is preferably a servo motor and a speed reducer. In other embodiments, the rotary power member 2-5 can also be a DC speed reducer or the like. As preferred, the rotation angle of the movable frame 2-4 is designed to be between -10 degrees and 60 degrees, so as to facilitate the detection of the product. Figures 8-10

[0086] In order to improve the stability of the movable frame 2-4, the station adjustment mechanism further comprises a side support 2-6. The rotary power member 2-5 is located at one end of the movable frame 2-4 and is connected with the movable frame 2-4 through a bearing. The side support 2-6 is located at the opposite end of the movable frame 2-4 and is used to rotationally support the opposite end of the movable frame 2-4 on the detection frame 2-3.

[0087] When the movable frame 2-4 adopts the rotation adjustment scheme, as preferred, when the carrier 2-1 on the movable frame 2-4 is in a horizontal state, the position of the carrier 2-1 is the interactive station, which facilitates the transfer of the jig 5 by the jig transfer unit 3. When the carrier 2-1 on the movable frame 2-4 is in a slanting upward state, the position of the carrier 2-1 is the detection station.

[0088] In some embodiments, the MURA film group, the carrier 2-1, and the probe module 2-2 can be respectively and positionally adjustably arranged in the movable frame 2-4. Of course, one of the MURA film group, the carrier 2-1, and the probe module 2-2 can be fixed with the movable frame 2-4, and the other two can be adjusted by the positional adjustment mechanism. As preferred, in this embodiment, the MURA film group is fixed with the movable frame 2-4, and the carrier 2-1 and the probe module 2-2 are positionally adjustable.

[0089] Specifically, as shown in FIG. 2, the MURA film group is arranged on the movable frame 2-4, and the carrier 2-1 is arranged on the MURA film group. The probe module 2-2 is arranged on the carrier 2-1. Figure 8 Figure 11 Figure 12 ​​​As shown, the MURA film set includes MURA films 2-7, a clamping assembly, and a tensioning assembly, wherein the MURA films 2-7 are stacked in multiple layers, the edge portions of the multiple layers of MURA films 2-7 are connected to each other, the MURA films are soft materials, and can reduce the interference of factors such as backlight on the product after the product is attached. As preferred, the MURA films 2-7 are provided with six layers, and the MURA films 2-7 avoid the first row of lamp beads at the edge of the product in the width direction.

[0090] Further, as shown in the top view, Figure 11 In the multiple layers of MURA films 2-7, the length of the MURA film 2-7 at the lowermost layer is greater than the length of the remaining MURA films 2-7 at the upper layers, and the circumferential edges of the multiple MURA films 2-7 are connected by adhesive. The exposed upper surface of the MURA film 2-7 at the lowermost layer has a number of avoiding holes for avoiding the limiting protrusions on the surface of the jig 5. When the product is attached to the MURA film 2-7 after being lighted, the MURA film 2-7 is used to reduce background interference and eliminate the influence of environmental factors such as backlight or ambient light, highlight the display defects, improve the accuracy and authenticity of detection, and help the detection personnel or detection module to detect some not obvious defects hidden in the display screen.

[0091] Further, the clamping assembly is symmetrically provided with two for clamping the opposite ends of the MURA film 2-7; and the tensioning assembly is used to adjust the distance between the two clamping assemblies, so that the MURA film 2-7 is in a flattened state under the action of tensioning force.

[0092] Further, as shown in the top view, Figures 11-12 The clamping assembly includes an upper clamping plate 2-8 and a lower clamping plate 2-9, which are respectively arranged at the two ends in the thickness direction of the MURA film 2-7 at the lowermost layer. The upper clamping plate 2-8 is in a Z shape, and the upper clamping plate 2-8 and the lower clamping plate 2-9 clamp the edges of the MURA film 2-7 at the lowermost layer and are locked by bolts. When the upper clamping plate 2-8 and the lower clamping plate 2-9 are locked by the bolts, the bolts also pass through the MURA film 2-7 at the lowermost layer (i.e. the MURA film 2-7 at the lowermost layer is provided with a through hole for the bolts to pass through), so as to realize the clamping of the MURA film 2-7 by means of hole column cooperation.

[0093] In other embodiments, the clamping assembly can be selected from the remaining manual tooling clamps or automatic components such as pneumatic fingers. By selecting a number of manual tooling clamps or pneumatic fingers, the two ends of the MURA film 2-7 can also be clamped.

[0094] Further, in some embodiments, one clamping assembly in the MURA film group is fixed on the movable frame 2-4, and the other clamping assembly is connected to the movable frame 2-4 through the tensioning assembly. The distance between the two clamping assemblies can be adjusted by adjusting the tensioning assembly to adjust the position of the clamping assembly connected by the tensioning assembly in the transverse direction.

[0095] In some other embodiments, the tensioning assembly can also be provided in two sets. Each set of the tensioning assembly corresponds to one clamping assembly. The two sets of the tensioning assembly are respectively connected to the clamping assemblies on the movable frame 2-4. The distance between the two clamping assemblies can be adjusted by adjusting one set of the tensioning assembly or adjusting both sets of the tensioning assembly.

[0096] Further, in this embodiment, one clamping assembly in the MURA film group is fixed on the movable frame 2-4 by a bolt, and the other clamping assembly is connected to the movable frame 2-4 through the tensioning assembly. Specifically, a through hole is formed in the upper clamping plate 2-8 of the clamping assembly. Correspondingly, a threaded hole is formed in the movable frame 2-4. The shank of the bolt passes through the through hole and is screwed into the threaded hole. The head of the bolt abuts against the top surface of the upper clamping plate 2-8.

[0097] Further, in some embodiments, the tensioning assembly includes a mounting seat 2-10 and a threaded rod 2-11. The mounting seat 2-10 is fixed on the movable frame 2-4. The threaded rod 2-11 is screwed through the mounting seat 2-10. One end of the threaded rod 2-11 is rotationally connected to the upper clamping plate 2-8. The length direction of the threaded rod 2-11 and the rotation direction of the threaded rod 2-11 are consistent with the length direction of the MURA film 2-7. During use, the threaded rod 2-11 is adjusted by screwing. The threaded rod 2-11 moves directionally during the adjustment process. The clamping assembly is driven to move linearly. The tensioning adjustment of the MURA film 2-7 is realized.

[0098] To prevent the threaded rod 2-11 from being touched by mistake, a nut is further sleeved on the threaded rod 2-11. After the threaded rod 2-11 is adjusted to the required state, the nut is screwed against the mounting seat 2-10 to fix the threaded rod 2-11.

[0099] Further, in this embodiment, two tensioning assemblies are provided at intervals. The two tensioning assemblies are used together for the tensioning adjustment of one clamping assembly to improve the stability of the tensioning adjustment.

[0100] Further, in some embodiments, the tensioning assembly includes a positioning bolt (not shown in the figure). The upper clamping plate 2-8 has a waist hole for the positioning bolt to pass through. The length direction of the waist hole is consistent with the length direction of the MURA film 2-7. The movable frame 2-4 has a threaded hole for the positioning bolt to be screwed into. The adjustment of the matching position of the positioning bolt and the waist hole can realize the adjustment of the tensioning degree of the MURA film 2-7.

[0101] In this embodiment, the tensioning assembly includes a mounting base 2-10, a threaded rod 2-11, and a positioning bolt. The mounting base 2-10 and the threaded rod 2-11 are used to adjust the clamping assembly, and the positioning bolt is used to lock it in place, which can effectively ensure the stability of the MURA membrane 2-7.

[0102] Furthermore, in this embodiment, the stage 2-1 and the probe module 2-2 are arranged sequentially along the thickness direction of the MURA membrane 2-7. To improve the stability of the position adjustment of the stage 2-1, multiple guide rods are fixed to the bottom of the stage 2-1. These guide rods are slidably mounted to the movable frame 2-4 via linear bearings, and the sliding direction is consistent with the thickness direction of the MURA.

[0103] Furthermore, in order to achieve position adjustment of the stage 2-1, the position adjustment mechanism includes a stage lifting structure, which can drive the support frame to be raised and lowered so that the sample to be tested in the fixture 5 on the stage 2-1 can contact the MURA membrane 2-7.

[0104] like Figures 8-10 As shown, in this embodiment, the platform lifting structure is selected as a synchronous lifter 2-12, which is installed in the movable frame 2-4 and used to lift the platform 2-1. In other embodiments, the synchronous lifter 2-12 can be replaced by a cylinder, hydraulic cylinder, etc.

[0105] Furthermore, to facilitate the receiving of the fixture 5 by the platform 2-1, the product testing unit 2 also includes a support wheel assembly that is adjustable in height at the platform 2-1. The support wheel assembly can be adjusted between a first position and a second position. In the first position, the support wheel assembly protrudes from the upper surface of the platform 2-1 for transferring the fixture 5 back and forth with the fixture transfer unit 3; when the support wheel assembly is adjusted from the first position to the second position, it is used to place the fixture 5 on the upper surface of the platform 2-1.

[0106] Furthermore, such as Figure 13 As shown, the support wheel assembly includes a support plate 2-13 and multiple support wheels 2-14 rotatably mounted on the support plate 2-13. The rotation axis of the support wheels 2-14 is perpendicular to the conveying direction of the fixture conveying unit 1 and consistent with the transfer direction of the fixture transfer unit 3. Multiple clearance openings for avoiding the support wheels 2-14 are provided on the upper surface of the platform 2-1.

[0107] Furthermore, in order to realize the lifting and adjusting of the support wheel assembly, a lifting adjustment component 2-15 is installed in the platform 2-1. The output end of the lifting adjustment component 2-15 is fixed to the support plate 2-13. The lifting adjustment component 2-15 is used to drive the support plate 2-13 to lift and lower. The lifting adjustment component 2-15 is preferably a cylinder.

[0108] Furthermore, the lifting apex of the support wheels 2-14 is set to be flush with the lifting apex of the rollers 1-10 in the lifting assembly, so as to facilitate the quick transfer of the fixture 5 by the fixture transfer unit 3.

[0109] Furthermore, to ensure that the fixture 5 accurately reaches the target position of the platform 2-1, the end of the platform 2-1 away from the fixture conveying unit 1 has a positioning post with a V-shaped groove 5-1 adapted to the fixture 5.

[0110] Furthermore, the position detection unit also includes a third sensor 6-3 disposed at the end of the stage 2-1 away from the fixture conveying unit 1. The third sensor 6-3 can be a contact sensor or other sensor capable of position / distance detection, with its detection end facing the positioning post. The third sensor 6-3 is used to detect whether the fixture 5 has moved into place on the surface of the stage 2-1.

[0111] Furthermore, such as Figures 8-10 As shown, to illuminate the product under test, the fixture 5, which carries the sample, is equipped with a POGO component 5-2, which is matched with the probe module 2-2. The position adjustment mechanism includes multiple lifting components 2-16, which are mounted on the lower end of the stage 2-1 via right-angle plates. These lifting components 2-16 drive the probe module 2-2 to adjust its height, allowing it to automatically rise and connect with the POGO component 5-2 for power-on, thus illuminating the product mounted on the fixture 5. Preferably, the lifting component 2-16 is a cylinder, while the POGO component 5-2 and the probe module 2-2 are existing technologies and will not be described in detail here. In other embodiments, the lifting component 2-16 can also be a hydraulic cylinder, an electric push rod, etc.

[0112] Furthermore, to ensure the stability of the product lighting process, the product testing unit 2 also includes a pressing mechanism for pressing and positioning the fixture 5 on the platform 2-1. The pressing mechanism includes a pressing power component 2-17 and a pressing plate 2-18. The pressing plate 2-18 is offset from the MURA membrane 2-7. The pressing power component 2-17 is connected to the platform 2-1 via a sheet metal part. The pressing power component 2-17 can drive the pressing plate 2-18 to move, applying pressure to the fixture 5 and achieving the installation and positioning of the fixture 5. In other embodiments, the pressing plate 2-18 may not be provided; for example, the pressing power component 2-17 can be mounted above the fixture 5, and pressure can be applied directly to the platform 2-1 through the output end of the pressing power component 2-17.

[0113] like Figures 8-10 As shown, in this embodiment, there are two pressing power components 2-17, and the output ends of the two pressing power components 2-17 are fixed together with the pressing plate 2-18 to form a gate-shaped structure. The pressing power component 2-17 is selected as a cylinder.

[0114] Further, a plurality of pressing strips are arranged on the pressing plate 2-18 at intervals, and the plurality of pressing strips can be adjusted in height by bolts, and the pressing strips can press the jig 5 at a fixed position.

[0115] Further, as shown in Figures 8-11 The position detection unit further includes a detection mechanism for detecting the distance between the MURA film 2-7 and the sample to be detected in real time. Specifically, the detection mechanism includes a sensor 6-4 arranged beside the MURA film 2-7, and the detection end of the sensor 6-4 faces the stage 2-1, for measuring the distance between the stage 2-1 and the MURA film 2-7.

[0116] Further, the detection mechanism further includes a length measuring tool installed beside the position sensor 6-4, the length measuring tool has a detection end for measuring distance which can be adjusted in length, and the detection end also faces the stage 2-1, when the product on the stage 2-1 is attached to the MURA film 2-7, the stage 2-1 is attached to the detection end of the length measuring tool, so that the length measuring tool can be used for distance measurement, and also as a hard limit structure.

[0117] As a preferred, the length measuring tool is selected as a micrometer 6-5, the measuring end of the micrometer 6-5 faces the stage 2-1, by adjusting the micrometer 6-5, the detection end can be adjusted in length, when the product on the jig 5 is attached to the MURA film 2-7, the detection end of the micrometer 6-5 can contact the part of the upper end surface of the jig 5 which does not carry the product, under this arrangement, the micrometer 6-5 not only can be used as a hard limit to limit the position of the jig 5, but also can be used as a detection piece to give distance data.

[0118] Further, the detection device further includes an information recording unit 4, when the stage 2-1 is located at the interactive station, and the product in the stage 2-1 is attached to the MURA film group and is illuminated by the probe module 2-2, the information recording unit 4 records the display information of the product. The information recording unit 4 is signal connected with the control unit.

[0119] Specifically, the information recording unit 4 includes an imaging device 4-1 and a position adjusting assembly. The imaging device 4-1 is provided in plurality, for taking pictures of the display condition of the product at the interactive station, and saving the defect photos; for example, the imaging device is provided with two, one of which is arranged directly above the detection frame 2-3 as the main imaging device 4-1; the other is arranged above the side of the detection frame 2-3 as the side imaging device 4-2, and the imaging device is preferably a camera. The position adjusting assembly is used to adjust the position of the imaging device, and the position adjusting assembly can be a multi-degree-of-freedom motion platform, a multi-degree-of-freedom mechanical arm, etc.

[0120] For example, as shown in Figure 14As shown, in order to adjust the main imaging device 4-1, the position adjustment component includes a multi-degree-of-freedom platform 4-3 and a first linear module 4-4. The multi-degree-of-freedom platform 4-3 is mounted above the product detection unit 2, the first linear module 4-4 is installed on the movable platform of the multi-degree-of-freedom platform 4-3, and the main imaging device 4-1 is installed on the slide of the first linear module 4-4.

[0121] When the conveying direction of the fixture conveying unit 1 is set to the X-axis direction, the multi-degree-of-freedom platform 4-3 can drive the first linear module 4-4 to rotate along the X-axis, Y-axis and Z-axis, and the first linear module 4-4 can drive the main imaging device 4-1 to move along the Z-axis, so as to realize the multi-degree-of-freedom adjustment of the main imaging device 4-1.

[0122] For example, such as Figure 15 As shown, to achieve adjustment of the side imaging device 4-2, the position adjustment assembly includes a second linear module 4-5 and an angle adjuster 4-6. The second linear module 4-5 is mounted on the side above the product inspection unit 2, and the angle adjuster 4-6 is mounted on the slide of the second linear module 4-5 via a triangular plate. The side imaging device 4-2 is mounted on the movable end of the angle adjuster 4-6. When the conveying direction of the fixture conveying unit 1 is taken as the X-axis, the second linear module 4-5 drives the angle adjuster 4-6 to move along the X-axis, and the angle adjuster 4-6 drives the side imaging device 4-2 to rotate along the X-axis, thereby achieving multi-degree-of-freedom adjustment of the side imaging device 4-2.

[0123] Furthermore, such as Figure 16 As shown, this testing equipment is also equipped with a frame structure, and a light-shielding structure 7 is installed on the surface of the frame structure. The fixture conveying unit 1, product testing unit 2, fixture transfer unit 3, and information recording unit 4 are located inside the light-shielding structure 7, which provides local light protection for multiple units.

[0124] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0125] It should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0126] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0127] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0128] Those skilled in the art can understand that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A MURA detection device, characterized in that, It includes a fixture conveying unit (1), a product inspection unit (2), and a fixture transfer unit (3), wherein: The fixture conveying unit (1) is used to convey the fixture (5) carrying the product; The product inspection unit (2) is located beside the fixture conveying unit (1) and includes: a platform (2-1) for carrying the fixture (5), a probe module (2-2) for illuminating the product in the fixture (5), a MURA membrane group for attaching the product to highlight product display defects, and an adjustment module for adjusting the relative positions of the platform (2-1), the probe module (2-2), and the MURA membrane group. The adjustment module is also used to drive the platform (2-1), the probe module (2-2), and the MURA membrane group to move together between the interactive station and the inspection station. When the stage (2-1) is located at the interactive work station and the stage (2-1) is separated from the MURA membrane module, the fixture transfer unit (3) is used to drive the fixture (5) to transfer back and forth between the stage (2-1) and the fixture transport unit (1). When the stage (2-1) is located at the testing station, and the product in the stage (2-1) is attached to the MURA membrane and illuminated by the probe module (2-2), the product is tested. The product testing unit (2) further includes a testing frame (2-3) and a movable frame (2-4) that is positionally adjustable on the testing frame (2-3). The MURA membrane module includes: MURA membrane (2-7) is stacked in multiple layers, with the length of the bottommost MURA membrane (2-7) being greater than the length of the other MURA membranes (2-7), and the bottommost MURA membrane (2-7) being fixed to the edge of the other MURA membranes (2-7); Two clamping assemblies are symmetrically arranged to clamp the opposite ends of the bottommost MURA membrane (2-7); The tensioning assembly, mounted on the movable frame (2-4), is used to adjust the distance between the two clamping assemblies to tension the MURA membrane (2-7).

2. The MURA detection device as described in claim 1, characterized in that, The stage (2-1), probe module (2-2), and MURA membrane assembly are housed in the movable frame (2-4); The adjustment module includes a station adjustment mechanism and a position adjustment mechanism. The station adjustment mechanism is used to adjust the position of the movable frame (2-4) to move the stage (2-1), probe module (2-2) and MURA membrane assembly between the interactive station and the detection station. The position adjustment mechanism is used to adjust the distance between the stage (2-1), probe module (2-2) and MURA membrane assembly. The workstation adjustment mechanism is used to drive the movable frame (2-4) to rotate.

3. The MURA detection device as described in claim 1, characterized in that, The product testing unit (2) also includes a pressing mechanism for pressing and positioning the fixture (5) on the stage (2-1).

4. The MURA detection device as described in claim 1, characterized in that, The product testing unit (2) also includes a support wheel assembly that can be adjusted between the first position and the second position; The support wheel assembly protrudes from the upper surface of the platform (2-1) in the first position and is used to transfer the fixture (5) back and forth with the fixture transfer unit (3); When the support wheel assembly is adjusted from the first position to the second position, it is used to place the fixture (5) on the upper surface of the platform (2-1).

5. The MURA testing device as described in any one of claims 1-4, characterized in that, The fixture transfer unit (3) includes: Clamp (3-1) is used for gripping and releasing the jig (5); A fixture adjustment assembly is used to drive the fixture (3-1) to move between the fixture conveying unit (1) and the product inspection unit (2).

6. The MURA detection device as described in any one of claims 1-4, characterized in that, The fixture conveying unit (1) includes: A conveying mechanism for conveying a jig carrying a product (5); The adjustment mechanism is used to drive the fixture (5) in the conveying mechanism to adjust its position so that the fixture (5) is separated from the conveying mechanism and located in the transfer trajectory of the fixture transfer unit (3).

7. The MURA detection device as described in claim 6, characterized in that, The adjustment mechanism includes: A blocking component is used to intercept and release the jig (5) in the conveying mechanism; A horizontal pushing assembly is used to push the fixture (5) in the horizontal pushing conveyor mechanism, and its horizontal pushing direction intersects with the conveying direction of the conveyor mechanism. The lifting component is used to lift the jig (5) that has been blocked by the blocking component and pushed by the flat pushing component, so that the jig (5) is lifted into the transfer trajectory of the jig transfer unit (3).

8. The MURA testing device as described in any one of claims 1-4, characterized in that, The MURA testing equipment also includes an information recording unit (4). When the stage (2-1) is located at the interactive station and the product in the stage (2-1) is attached to the MURA membrane and lit up by the probe module (2-2), the information recording unit (4) records the display information of the product.

9. The MURA detection device as described in any one of claims 1-4, characterized in that, The MURA testing equipment also includes a sensor (6-4) and a length measuring tool disposed next to the MURA membrane assembly. The detection end of the sensor (6-4) and the telescopically adjustable detection end of the length measuring tool are both facing the stage (2-1). When the product on the stage (2-1) is attached to the MURA membrane assembly, the stage (2-1) is attached to the detection end of the length measuring tool.

Images